Pump.



Patented nov. I9, mol. Hann.

P U Il P (Applicavtion tiled Mar. 6, 1900.)

(lo Model.)

JOSEPH HORN, OF PHILADELPHIA, PENNSYLVANIA, ASSIGNOR TO TIIE NAPPEL PUMPCOMPANY, OF HARTFORD, CONNECTICUT, A CORPO- RATION OF CONNECTICUT.

PUMP.

SPECIFICATION forming part of Letters Patent No. 686,939, dated November19, 1901.

Application tiled March 6,1900. Serial No. 7,502. (No model.)

To all whom t may concern:

Be it known that I, JOSEPH HORN, a citizen of the United States, and aresident of the city and county of Philadelphia, State of Pennsylvania,have invented certain new and useful y Improvements in Pumps, of whichthe followpumps; and the object of my invention is to furnish a meanswhereby the leather cups of the pistons may be at any time adjusted tobear more or less tightly against the barrel in order to increase theefficiency of the pump.

In the accompanying drawings, forming part of this specification, and inwhich similar letters of reference indicate similar parts throughout theseveral views, Figure 1 is partly a side and partly a central sectionalelevation of my improved pump; Fig. 2, a section of Fig. l on lineAB;Fig. 3, asection of Fig. 1 on line C D; Fig. 4, a side elevation of thelower end of the pump; Fig. 5, a plan of wing-nut adapted to hold inplace and operate the expanding-plug, which distende the cups of thepistongFig. 6, a plan of nut for securing the lower cup of piston to thepiston-rod.

a is the barrel of my pump; b, the pistonrod; c, a cap closing the topof the barrel; d, a base which carries the lower end ofthe barrel. Thelower part of the barrel a is tapered, as shown at e, and the base d isfurnished with a correspondingly-tapered hole, in which the part e iits.

f is a plug closing and filling the tapered lower end of barrel o; g, ascrew secured centrally to plug f and passing out through base d 5 h,nuts on screw g, which, together with the screw, prevent the barrel frombeing lifted from the base.

t' is a port opening through the tapered side of barrel a and up throughand to the top of plug f'; j 7c, ports in the sides of base CZ.

In the drawings the plug closing the bottom of the barrel is shownconstructed in two piecesff butin practice it can be constructed in asingle piece, if desired.

The piston rod b is angular and passes through a hole in cap cofcorresponding form. Hence by turning this rod the barrel o can be turnedso as to bring the port i into register with either of the portsj 7o,suitable stops Z fm, carried by base d, and a stop n, carried bybarrela, limiting the rotary movement of the barrel.

o is a stirrup to enable the pump to be held by the foot while it isbeing operated.

The pump may be operated to draw in liquid through one port, as j, andby turning the barrel to discharge it through the other port 7c. It maybe operated to both lift and discharge through the same port or as atestpump, as desired.

The bottom of the pumpbarrel being tapered and entering and working in atapered hole in base CZ, the former tends to grind a seat for itself inthe latter, and after long use the joint between the barrel and seat isas tight as it was in the iirst place.

In order that the lower end of the pistonl may expel all the air orliquid from the barrel when at the bottom of its stroke, the lower ortapered end of the barrel o is completely filled with a plug f or ismade solid, with the exception of the port t', the lower end of thepiston being adapted to engage the top of this plug when at the bottomof its downward stroke.

In order to insure a satisfactory operation of the piston, it isconstructed as follows: 1J q are leather cups placed back to back, thesides of the former extending upward and the sides of the latterextending downward. r is a stop carried by the piston-rod l), the lowerend of which engages the cup p and the upper end of the Shanks of whichis cylindrical and threaded and the lower end of which is conical iuform. 15 is a washer-nut carried on lower end of piston-rod b, whichserves to force the bases of the cups p q together and against the baseof the stop fr. u is a tapered washer placed small end downward on thestop r, the periphery of which engages the upper inner end of the sidesof cup p, as 4 shown. The upper cup being out of contact with liquid andthe upper end of the barrel IOO il @t lates as follows: The taperedwasher u is placedl on stop r and engages the inner upper s'ides of thecup p and is held firmly in engagement therewith by the wing-nut QJ,which is carried by the threaded portion of the stop r. As the cup pwears, the washer is set farther down on the stop by screwing down thewing-nut, the tapered face of the washer forcing the cup farther andfarther outward as it descends, this action being further increased bythe conical form of the lower part of the stop, which When the washer isforced down over it increases its diameterby forcing it outwardly fromthe center.

The arrangement used upon the upper cup can, if desired, be also used inconnection with the lower cup; but as this latter cup is in directcontact with the liquid it will usually be on its downward or operativestroke held ner sides of said cup, and a nut carried 0n.

said stop whereby said Washer may be driven inside said cup as and forthe purposes set forth.

JOSEPH HORN. W'itnesses:

GEORGE W. SELTZER, CHARLES A. BUTTER.

It is hereby Certified that the name of the assignee in Letters PatentNo. 686,939, granted November 19,1901,npon the application of JosephHorn, of Philadelphia, Pennsylvania, for an improvement in Pumps, 4Waserroneously Written and printed The Nappel Pump Company, Whereas thesaid name should have been Written and printed The Noppel Pump Company;and that the said Letters Patent should be read with this correctiontherein that the same may conform to the record of the ease in thePatent Oii'iee.

Signed, eountersigned, and sealed this 3d day of December, A. D'., 1901.

[SEAL] F. L. CAMPBELL,

Assistant Secretary of the Interior.

Gountersigned F. 1. ALLEN,

Commissioner of Patents.

